#pragma once

#include "../comm/log.hpp"
#include "../comm/util.hpp"

#include <iostream>
#include <string>
#include <unordered_map>
#include <vector>
#include <assert.h>
#include <fstream>
#include <mysql/mysql.h>


namespace ns_model
{
    using namespace std;
    using namespace ns_log;
    using namespace ns_util;

    struct Question{
        std::string number;
        std::string title;
        std::string star;
        int cpu_limit;
        int mem_limit;

        std::string desc;
        std::string header;
        std::string tail;
    };

    const std::string oj_questions = "oj_questions";
    const std::string oj_answer = "oj_answer";
    const std::string host = "127.0.0.1";
    const std::string user = "oj_client";
    const std::string passwd = "123456";
    const std::string db = "oj";
    const int port = 3306;

    class Model
    {
    public:
        bool QueryMysql(const std::string& sql,vector<Question>* out)
        {
            MYSQL* my = mysql_init(nullptr);
            if(nullptr == mysql_real_connect(my,host.c_str(),user.c_str(),passwd.c_str(),db.c_str(),port,nullptr,0))
            {
                LOG(FATAL) << "链接数据库失败!" << "\n";
                return false;
            }
            mysql_set_character_set(my,"utf8");
            LOG(INFO) << "链接数据库成功!" << "\n";
            if(0 != mysql_query(my,sql.c_str()))
            {
                LOG(WARNING) << sql << " execute error !" << "\n";
                return false;
            }

            MYSQL_RES* res = mysql_store_result(my);
            int rows = mysql_num_rows(res);
            int cols = mysql_num_fields(res);
            Question q;
            for(int i = 0;i < rows;i++)
            {
                MYSQL_ROW row = mysql_fetch_row(res);
                q.number = row[0];
                q.title = row[1];
                q.star = row[2];
                q.desc = row[3];
                q.header = row[4];
                q.tail = row[5];
                q.cpu_limit = atoi(row[6]);
                q.mem_limit = atoi(row[7]);
                out->push_back(q);
            }
            mysql_free_result(res);
            mysql_close(my);
            return true;
        }
        bool GetAllQuestions(vector<Question>* out)
        {
            std::string sql = "select * from ";
            sql += oj_questions;
            return QueryMysql(sql,out);
        }
        bool GetOneQuestion(const std::string& number,Question* q)
        {
            bool res = false;
            std::string sql = "select * from ";
            sql += oj_questions;
            sql += " where number=";
            sql += number;
            vector<Question> result;
            if(QueryMysql(sql,&result))
            {
                if(result.size() == 1)
                {
                    *q = result[0];
                    res = true;
                }
            } 
            return res;
        }
    };
}